Add BeginFrameObserverProxy

content/browser/renderer_host/render_widget_host_view_mac.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 #include <IOSurface/IOSurfaceAPI.h>
 #include <list>
@@ skipping 463 matching lines @@
   void DelegatedFrameHostSendCompositorSwapAck(
       int output_surface_id,
       const cc::CompositorFrameAck& ack) override;
   void DelegatedFrameHostSendReclaimCompositorResources(
       int output_surface_id,
       const cc::CompositorFrameAck& ack) override;
   void DelegatedFrameHostOnLostCompositorResources() override;
   void DelegatedFrameHostUpdateVSyncParameters(
       const base::TimeTicks& timebase,
       const base::TimeDelta& interval) override;
+  void DelegatedFrameHostSendBeginFrame(
+      const cc::BeginFrameArgs& args) override {}
 
   // AcceleratedWidgetMacNSView implementation.
   NSView* AcceleratedWidgetGetNSView() const override;
   bool AcceleratedWidgetShouldIgnoreBackpressure() const override;
   void AcceleratedWidgetSwapCompleted(
       const std::vector<ui::LatencyInfo>& latency_info) override;
   void AcceleratedWidgetHitError() override;
 
   // Transition from being in the Suspended state to being in the Destroyed
   // state, if appropriate (see BrowserCompositorViewState for details).
@@ skipping 80 matching lines @@
 
   // Factory used to safely scope delayed calls to ShutdownHost().
   base::WeakPtrFactory<RenderWidgetHostViewMac> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewMac);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_